Resilient-hub wheel.



D. SILVESTRI. RESILIENT HUB WHEEL.

AFFLICATION FILED use. 6. 191:.

Patented May 25, 1915.

4 SHEETS-SHEET I.

FIG-l I n. SILVESTRI. RESILIENT HUB WHEEL.

APPLICATION FILED DEC- 6. I911- Patented May 25, 1915.

4 SHEETS-SHEET 2.

D. SILVESTRI.

RESILIENT HUB WHEEL.

APPLICATION FILED 050.6.1911.

. Patented May 25, 1915.

4 SHEETSSHEET 4.

35 and guiding the members which control the ATES PATENT onr cn'.

- DANTE sILvE s'rm, or ROME, iT'ALY.

. RESILIENT-HUB To all whom it may concern:

Be it known that I, DAN'rn SILVESTRI, a

subject of the King of Italy, residing at Rome, in the Kingdom 'ofItaly,have invented new and usefulImprovements in -Resilient-Hub lVheels, ofwhich the following is a I specification.

T he present invention relates to a'resilient hub for wheels of roadvehicles which is also applicable'to vehicles running on rails.

The invention has more particularly for its objecta hub, the operatingmembers of which have the form of two disks of very hard steel,thesurfaces of which are formed with prismatic PI'OJBCtlOIlS and radialand 1 co-axial recesses or inclined contact surfaces in such amannerithatby reasonof thereciprocal contact surfaces, a stablesupport'is insured-fin every direction (that is in the normal andvertical planes of the concentric external structure forming the coverof the housingithus providing a complete resilient action for the hub.This resilient ac- -'.tion consists in transforming and absorbingthe-shocks due to the uneven surface of the road, as well as ineliminating torsional stress of the axle in order to give the leastpossible disturbance to the vehicle, but without producing lateraldisplacements to the complicated .parts of the wheel. This ob-.

ject is attained by applying to the axle, a

movable concentric disk which,under spring ,7

action or similar .resilient means, is pressed against another diskrigidly fitted to a convenient part of the metal hub containing by acombined turning and sliding move-' ment of the mechanism is effected.

As both disks are formed with recesses and corresponding prismaticprojections any angular displacement of the rigidly mounted diskrelatively to the movable disk will Specification of Letters I atent.

Patented May 25,1915.

i *Application filedDecember 6,1911. SerialNo.664, 146.

Figure I 's a transverse section of the mechanism arranged in theinterior of the hollow hub shown in the normal position; F igs. II andIII are corresponding views of the mechanism in use displaced downwardly.-and upwardly respectively; Figs. IV and V are 'front views of themovable disk 4 and disk 5 fixed to the casing 1, the surfaces of the twodisks having recesses and radial prismatic projections and co-axialsectorshaped portions; Figs. VI and VII are transverse sections of thetwo disks symmetrically disposed corresponding to the position shown inFigs. I, II, and III.

The metallic structure 1, 1, 2, 3,13 which forms the casing or housingin which the apparatus is placed and guided, consists of a box orchamber of cylindrical form and limited by the walls 1, l, in which canturn radially over a distance corresponding to the maximum displacementpermissible, a second box or chamber 2 which is mounted disk 4 guided bythe flangesll and 12.

The disk 4 is held "in elastic contact with the external casing-and isin contact with the disk 4 by its inclined surfacesl l, 15, 16, 17 inthe form of isosceles triangular prisms upon the sleeve 8 upon which isseated a the meeting edges or ridges of which are extended in radialdirection to the circumference of the disk as shown in Fig. IV, whileFig. V shows the parts or prisms which project or are raised, on thedisk 4 and which correspond with recessed portions of the disk 5 andvice versa. These corresponding parts or faces on the disk 5 have thesame reference numerals as the parts in disk 4 but with indices, viz:14, 15, 16, 17. Between successive prisms are conical sectorshapedportions 20, 21 which are concentric to the axis and oppositely inclinedto each other.

In Figs. IV and V are shown disks with 4 prisms and correspondingrecesses, adapted to provide elastic action of the mechanism, but anyother number of prisms may be used. The Figs. I, II, and III clearlyshow the action of both disks when they are in contact with each other.For instance,,if

by reason of a shock, the wheel is caused to rise, see Fig. 11, the disk5 also rises'and by pressing against the conical concentric upper faces21, 20 and against the lower faces-14 1 6 of the radialprisms of thedisk 4, has 6 points of contact so causing the disk 4 to movelongitudinally to the axis, thereby compressing the springs '6, whichtake up the shock in a horizontal direction. The

successive conical faces 20, 21 and the up per faces 1715 and 17 of theradial prisms become separated by this movement 1 s0 that'frictionislessened; the same effect is obtained with the opposite movement ofthe wheel, that is to say when the wheel enters a rut,'see Fig. IIL In asimilar manner there Will always be the same 6 points of contact of theopposite lower conical faces 2121" and -20" and of the faces 15 and 15of the radial prisms with corresponding separation of other surfaceswhen the shock is' received in a direction intermediate of theridgesl'l-S and 19. Rotary movement'is' to longitudinal guideways andkeys on the top flange 12 of the disk 4.

To prevent dust from entering, cover plates 7 are fitted outside the.walls 1, 1'

' and one ofsaid cover plates may be formed by the plate 13 which servesas an intervening member for transmitting the power. By-

means of leather rings placed in circular grooves '88 in said plates .7and 13,hermetic joints are provided. In the drawings, the axle isrepresented as mounted in ball bearings 9-10. When the shock ortorsional strain has ceased, the parts are caused to return to theirnormal position by the; springs 6 so that the hub is self-centering andthe'radial prismatic projections and concentric sector-shaped portionswill con-- 7 stantly tend to return the two co-acting disks to'theconcentric position in an elastic manner so that the axle can turnthewheel, connected with the hub-mechanism,

without receiving shocks through a rigid assemblage. a t

I claim: Y 5 1'. A. self-centering resilient hub for yethe outer box,the central sleeve connected with the inner box, two frictiondiskswithhicles comprising an outer and an inner hub-box, a wheel-bodyfirmly'connected with r inthe latter having a plurality of inclinedcontact surfaces of radial prismatic form in the faces of said disks,- asliding connection between one of'said disks and the inner hubbox, andelastic meansfor pressing the said disks together, as and for thepurpose stated.

2. In a resilient wheel, I the combination with a wheel-bodyand-an outerdivided hollow metallic hub-box, of an inner hub-box,

an integral concentric hollow boss on the latter, a sleeve fast in theinner hub-box, a

rear plate integral with said sleeve, an alterv nately recessed andembossed flanged fric-.

tion ,disk seated upon said sleeve. and slidably held in theinne'rhub-box, aspiral springbetween the side wall of thelatter and theadjacent face of said friction disk,

a corresponding rear friction disk at the op,

posite face of said friction disk, a large central opening in the rearfriction disk, and-a ri (1 connection between the said outer hub-box.

DANTE SILVESTRI.

. Witnesses: 7

11mm ,VI'NERY, DALEssANDRo Amnnno. f

so latter and the.

